Valve-grinding tool and the like



T. A. PARMENTE R. VALVE GRINDING TOOL AND THE LIKE.

.APPL ICATION FILED APR. 8, 1921.

Patented Aug. 15, 1922.

" To all 207mm it may conta n:

"newest, I,

s te

THEODORE A P'AR EnTnmoF meme, wisoonsIit L-H 've 1t known that LhTnnononnA PARe iniv'inn, citizen of the LUnited States of? America, and resident of Racine, county of Racine, State of Vi is'c onsin; have invented certain nefn and "useful Improvements in and Reiating'to delve-Grinding .T 001s and the like, of whlch the following s especification. I r

.' This invention relates to certain 1mprovements in valve grindingtools and the like;

7 and the nzitufe and objects of the invention will be readily, understood by those skilled in the art inthe'li'ght of the following ex pie-nation of the aceoinp zu -ying drawings il-j 'hlstratlng What I no'wvfbel eve to bethe pr e-v.

ferred embodiments; or mechenicalexpres fl sions of nay-invention from among other forms, constructions, arrangements and'oo nblnatlons With n the spirit and scope thereof;

The present invention has particnleri refei'ence to grinding the valves ofinternel combustion motors. ASjYOH'kllOWILELDCiflII- l v del'stood'by thosefa'miliar with the art, one

of the prevailing methods. of grinding the valves of an internalcombustion motor consists in rotating each valve in andfzigeinst its seat,- a c'ertzun amount." of pressu 'e" be? ing exerted upon ithe 'velve, so that the fece of the valve'bearing and rotated against the face of the valve seat grinds these contactingxsnrfzices zuvgiy end results in the proper tight seatlng oi the valve. Experlence has shown that the most jefiicient manner of.

grinding a valve in the "ehoveinenner', isto alternately, rotate the samebeck and forth 1 approximetelya, half turn ;1n' one direct on" and it half turn in the 'eversedirectio ,at; the same time giving the valve a siower'iote-v tion, so that the grinding ectionivill be even 1y distributed around the contact ng snip, W111 seat in pi oper fit faces and the valve and alineinent. H e I .1 r l One ofthe'objects' of this inventionis to provide a 1nanii2t11yoperated grinding tool crease Applicatibn filed April 3 other hand of the operator.

'vide a grinding tool of the type referred to,

l Speeificetion'ot Letters Pgte n'ti Patented j i 1' i new ebject of'theinvntion is "ta- 5m,

in which 'the rapid; back and forth-rotation,

of the valve is in pdrted' by the movement fl -fingers offone hzindl of an operetorglend --the1slowjvrotetion otthe,velve ithe'.pi esslnfe I v s epplied to the valvegandthetool isgnidv ed; and maintained" in alineinent," by the I ,-,G51-' Another object oftheinventionis to. pro-r] vide a grinding tool offthe general type referred to; in which I the fectuet-ing lever. for imparting the rapid,ebeckjendgforth- 'i-ot'a.-. T tion'of the 'vgclve', is'fiso, consti-uctechjmounted} end arrangedthat it can bepositionedbelf tween fingers of zthendof en operatoi and:

rapidly oscillated by coinparativelyaj slight Inovement ofathe fingers to secuife; the de 'i 'sn'ed rota-t onfback and forth of the valve end ithout requi ing' ztnyinovernent-of the opeietors arm, thusevo dingfthefatiguing, I

effect of arm movement.

ment of fingers of a handot operator to g ven it by the operators fingers; d 1

ther objectfof 'he'invention is-to'pifoe N h A.

vide an improved guidinggend elining' hen; v die $015 "a grinding "tool of the general type referred to5 which handle is adapted to be grasped by a, hand 01; anf operator, sue

it manner that pre ssn1 eis ye'xerte'dj on the valve through-l the palm ort'lthe. hand, the tool 'is'guided and alinedfby the fingers of. v the hand andv the slowlotation is imparted? to'the valve byn'iovenient ofthe handigre'spg j, ingthishendle, i

tkllOthQI obj ect be the" invention" is] to "pi-b: vide a- .m'anua'lly operated -va,1ve grindlng toolof the g enei elitype' eiterired to, in'which theien'elfgy endextent omanual movement f Another. obj ectof the invention isto" PTO-1',

vide 2t" grindingil'tooh of th'e 'geneml typev reteri ed to; with actuating lever; adapted" tobe operated byc omparetively slight move i iinpei t the desired. mind beck and "forth i otetionto a vz tlve,fend' to construct and 'ei'rengethis ifeveifso' thetyit provides Ila stopf to iiinit'th eiz n 'eof movement that may be requii ed toopemte the seine 'is' redncedftoq a inininiumithespeed end effi'oiency of'opelff" atio'n-"are materially increased end-the time" required, to grind a valve;is 'jiriaterielly d v "creased ovene'xi'sting formjs'fofthi's general He p-116a,

o I golf-IT J engeinent end ifnonnting i oi: the operating gears and the mechanism actuated thereby,

as well as to provide improvements in the details of construction andmanner of assembling the various elements of a tool embodying the features of the present inven-"- tion.

With these and other objects in View, my i vention consists in certain novel features in constructions and arrangements. of parts as more fully and particularly set forthand speciiiied hereinafter.

Referring to the accompanying drawings: Fig. 1 is a perspective view of a grinding tool embodying the features of the present invention and showing (in dottedflines) particularly the position and. relation of the fingers and hands with respect to the operating handles of the tool in grinding a valve (shown in dotted lines). p

Fig. 2 is a side elevation showing the op erating handle providing a stop limiting the range of movement thereof, parts of the tool being shown in vertical section and parts being broken away.

Fig,3 is a side elevation showing the tool in a position the reverse of Fig. 2.

Fig. 4 is a detail horizontal section taken onithe line,4t4, Fig. 2.

In the particular form and embodiment of the invention illustrated in the drawings, a one-piece body is provided which coinprises a centrally open, in this instance, substantially circular, frame 1, a'guiding'and pressure handle 2, integral therewith and extending laterally and outwardly therefrom, and elongated bearing-or journal 3, integral with the frame 1 and extend ng laterally and outwardly from the frame 1 at a point diametrically opposite and in line with the guiding handle 2. The bearing 3 is formed with a. central bore 3 extending thercthrou gh and in alinement with the,

longitudinal center of the handle 2. bushing 8 of steel or any other desired or suitable material is inserted in and extends throughout the bore3 of the bearing 3. The guiding handle 2terminates in a cylindrical cross bar 2% in this instance formed integral with the body length of the handle 2. This head or cross bar 2' of the handle 2 is formed to fit and be received in the palm of a hand ofan-operator, as will be fully referred to and explained hereinafter. The inner endportion of the handle 2 is formed with a laterally extending boss 2 and a boreis prov ded extending centrally through the boss 2 and transversely v through the handle2. A shaft 4: is mounted fat outer face located on the same side of no frame as the boss 2? and the extended ree end of the shaft l.

bearing 3, being suitably journaled in the bore 3?" nrovided with the bushino 3 as b a clearly shown in Fig. 2 of the drawings.

The spindle 6V is formed. with a collar 6? in this instance "integral therewith, which abuts against the outer end of the bearing 3 to distance within the open frame 1 and has a' i a pinion 7 suitably keyed thereon. ine pinion 7 is secured against longitudinal movement by a nut'8 on the inner vend of the i A spindle 6 is rotatably mounted in the a 2 I prevent inward movement oftlie spindle The outer end of spindle which'is screw threadedto receive 1 the same.

which the hub 7 of th e pinion 7 bears.

A segmental gear 9 is rockably mounted on the free end of the Slltfhl and is main-v tained against displacement therefrom by the enlarged head 4 of the shaft a, it being understood of course, that a nut may be utilized in place of the enlarged head i A washer et is interposed between the head 4? and the gear 9. The teeth 9 of the gear 9 are arranged along the inner face adjacent the curved edge thereof and with the gear 9 in position on the shaft 4- are-in meshwith the pinion 7 within the frame 1, thediann eter of the pinion being greater than the width of thefraine and the boss 2 spacing the gear 9 a distance outwardly "from the frame 1, This rocking movement of the gear 9 will impart a back and forthrotation.

to the pinion 7 and spindle 6. A guardlO comprising a flat strip of material is secured by screws l0 ror the like, to the flat face of the raised portion 3 on the bearing 3. i The fiat strip forming the guard 10 extends a distance nwardly over-the outer face of the gear 9 and is bent outwardly so as not to normally contact with the gear but to provide against the gear 9 moving out of mesh with the pinion 7. The guard 10 further provides a stop against which the h1g9 formed integral with an outer end of the gear 9, abuts and limits the extent of roclr' mg movement in one direction of the segmental gear 9; a u i It will be noted that thesegmental gear!) is formed with the straight radial edges 9 i and 9- extending from the center upon which the gear is rocked, at which point the gear 9 is mounted upon the shaft'a, to the curved outer edge. thereof at an acute angle to the center 11118 divid ng the segmental gear. Along the inner face of the segmental gear A fiat bea ring'siirface l is, formed in the fram 1, around the inner end of the bore'3 which receives and against through pinion 7 causes an alternate back" 9 and parallel to the edge 9 are a pair ofparallel, spaced ribs 11,: in thisinstance,

formed integral with the body of the gear 9. An operating handle 12 formedof a fiat strip of steel, or any othersuitable mate rial, is secured'at its inner end between the ribs 11 and against the face of the gear 9 by 'rivets,,bolts or the like 13, This flat strip handle 12; extends outwardly adistance beyond the gear 9 and pai allel and in line with the straight edge 9 of" the gear 9. The extended free length of the handle 12 is twisted until the plane of the strip forming the same. lies at right "angles to the plane of the'portion. secured between the ribs 11 and. against the inner face of the gear 9. The twisted or bent portion 141 of the handle 12 is locatedat the edge of the gear 9 and provides ashoulder 141 which forms a stop to abut against the edge of the frame 1 to limit downward rocking of the handle 12 and gear 9.

The outer end of the spindle 6 is screw threaded and a grinding, bit 15 having a threaded bore 15 is Referring particularly to Figure 1 of the accompanying drawings in operation the bit 15 is placed in the groove of the valve Vi shown in dotted lines, and the hand L of an operator is placed over the handle 2 with the palm resting upon the cross bar 2 andthe fingers 1 of the hand bearing lightly against the opposite sides of the body length of the handle 2. The desired pressure is appliedto the valve through the hand L and the fingers 1 are utilized to aline and guide the tool. The operator then engages the fiat handle 12 with theopposite hand R, .the handle being held between the fingers r and 7, preferably the socalled first and second fingers of a hand. It is seen that the fiat sides of the handle 12 are engaged by the fingers r and r and hence these are not to any appreciable degree separated but remain in normal and natural extended position. Now, by an entirely finger and hand movement and without bring the arm of the operator into play, the fingers r and r are rapidly moved up and down in what might be termed a jiggling movement. This up and down movement rocks the gear 9 and and forth rotation of the spindle 6 and'the valve V, which bears against its seat (not shown) and grinds away. the contacting. surfaces, Simultaneously with the rapid up and. d'ownvmovement; of the fingers of the g handR, aislow rotation is imparted to the en-Q I tire-tool 'bythe hand- L'through the handle 2 and crossbar 2? inthis manner. causing- .slowrotation ofthe valve V to apply the I back and forth grinding rotation evenly aroundthe valve and its seat. 'As herein-I beforeexplained, the most eflicient and rapid method of grindingvalves in'the manner describedis to impartthe rapid' back and forth I rotation about a halfturnfin-each direction.

Due to the construction and arrangement of the operating handle 12- and the gear 9,

this half. turn, alternate rotation is readily son imparted to the valve by the finger motion I and with greater acouracyand speed than heretofore possible where air armv movement I has been required to operate the tool. The naturallimitsof. the up and down movements of the fingers ofa hand in, imparting the jiggling movementto the han-. dle112Tin-13osit-ion therebetween,.is such that, I

the gear 9 is -roc'ked a distance to rotate. the spindleand' the attached bit the half turn in.

each direction within quite an accurate degree'and without other care and attention 3 on the part of the. operator than to maintain the finger movement within the natural limits defined by the beginning of" an arm movement when exceeded. The'operator can remain within these natural limits of movement very readily and without giving any special thought or attention,theretoythus permitting very rapid movement with substantial accuracy in the valve rotations and a very appreciable increase in speed of the operation. The peculiar fiat form and construction of the handle 12 with the twist 14 provides the shoulder 14? adapted to strike or abut against the frame 1 to form the extreme limitof downward movement, while the lug 9' at-the opposite end of the gear9' provides the stop adapted to strike against the guard 10 and form the extreme'limit of upward movement of the gear 9, info-peration. "The body 'of'the tool consisting of the handle 2-2, the frame 1 and the elongated bearing 8 formed in one piece provides for'easy and inexpensive manufacture and presenting an extremely simple but strong construction,"

The handle 12, being preferably formed of H i steel adds to the strength of the tool in that it will not be readily broken in the operation and hardusage to which these grinding tools areput in use. The simplicity of the bearlng constructions which receive the mov ing surfaces and. the general arrangement and assembly provides a grinding tool of this type. which is extremely simple but du rableand which permits of increased accu-' racy and "production due tov the hereinbefo-re described mode of finger. operation; I

ft is evident that various changes, modifications and variations might be res'ortedto without departing from the spirit andscope of my invention and hence i do not wish to limit myself to the exact disclosures hereof.

\Vhat I claim is 2- I 1. In a valve grinding tool, the combination with a frame, a spindle onrnaled in the frame, a pinion mounted on said spindle, and a rockahly mounted segmental gear in mesh ,vith said iinion for imparting aback and forth rotation to said spindle, of, aflat operating handle secured to said gear and extending radially a distance therefrom, the

\ extended lenq'th'of said handle twisted lonmesh with said pinion for imparting an alternate back and forth rotation of approximately half a turn in each direction to the said spindle, of, an operating handle con sisting essentiallyiof a comparativelynarrow flat strip secured to the innerface of the said gear adjacent and parallel to one of the radial edges thereof and extending a distance outwardly therefrom, the extended.

length of said handle longitudinally twisted with the flat faces thereof at approximately right angles to the secured fiat faces and the twisted portion forming a stop to engage the adjacent outer edge of the frame andlimit rocking movement of the said handle and gear, the form and arrangement of the operating handle being such that it is engaged between normally I extended fingers of the hand of an operator and rapidly rocked within the natural limits of extended finger movement whereby a rapid back and forth rotation of half a turn in each direction is imparted to said spindle, substantially as shown and described.

rnnononn A. raannnrnia. 

